C++ pango_font_description_set_size函数代码示例

/* callback to react to key press events */
static gboolean
key_press_cb(VteTerminal* vte, GdkEventKey* event)
{
    if ((event->state & (TINYTERM_MODIFIER)) == (TINYTERM_MODIFIER)) {
        switch (gdk_keyval_to_upper(event->keyval)) {
            case TINYTERM_KEY_FONTSIZE_INCREASE:
            {
                const PangoFontDescription *font = vte_terminal_get_font(vte);
                pango_font_description_set_size(font, (pango_font_description_get_size(font) / PANGO_SCALE + 1) * PANGO_SCALE);
                vte_terminal_set_font(vte, font);
                return TRUE;
            }
            case TINYTERM_KEY_FONTSIZE_DECREASE:
            {
                const PangoFontDescription *font = vte_terminal_get_font(vte);
                const gint size = pango_font_description_get_size(font) / PANGO_SCALE - 1;
                if (size > 0) {
                    pango_font_description_set_size(font, size * PANGO_SCALE);
                    vte_terminal_set_font(vte, font);
                }
                return TRUE;
            }
        }
    }
    return FALSE;
}

static void
dump_font_sizes (PangoContext *context, FILE *f, guint flags)
{
  PangoFont *font;
  PangoFontDescription *pfd;
  int nf;
  real height;

  fprintf (f, "height/cm");
  for (nf = 0; test_families[nf] != NULL; ++nf)
    fprintf (f, "\t%s", test_families[nf]);
  fprintf (f, "\n");

  for (height = 0.1; height <= 10.0; height += 0.1) {
    fprintf (f, "%g", height);
    for (nf = 0; test_families[nf] != NULL; ++nf) {
      pfd = pango_font_description_new ();
      pango_font_description_set_family (pfd, test_families[nf]);
      //pango_font_description_set_size (pfd, height * pixels_per_cm * PANGO_SCALE);
      if (flags & DUMP_ABSOLUTE)
        pango_font_description_set_absolute_size (pfd, height * pixels_per_cm * PANGO_SCALE);
      else
        pango_font_description_set_size (pfd, height * pixels_per_cm * PANGO_SCALE);

      font = pango_context_load_font (context, pfd);
      if (font) {
        PangoFontMetrics *metrics = pango_font_get_metrics (font, NULL);
	/* now make a font-size where the font/line-height matches the given pixel size */
	real total = ((double)pango_font_metrics_get_ascent (metrics)
	                    + pango_font_metrics_get_descent (metrics)) / PANGO_SCALE;
	real factor = height*pixels_per_cm/total;
	real line_height;

        if (flags & DUMP_ABSOLUTE)
          pango_font_description_set_absolute_size (pfd, factor * height * pixels_per_cm * PANGO_SCALE);
	else
          pango_font_description_set_size (pfd, factor * height * pixels_per_cm * PANGO_SCALE);
	pango_font_metrics_unref (metrics);
	g_object_unref (font);

	font = pango_context_load_font (context, pfd);
	metrics = pango_font_get_metrics (font, NULL);

	line_height = ((double)pango_font_metrics_get_ascent (metrics)
	                     + pango_font_metrics_get_descent (metrics)) / PANGO_SCALE;
        fprintf (f, "\t%.3g",  flags & DUMP_FACTORS ? factor : line_height);
	g_object_unref (font);
      }
      pango_font_description_free (pfd);
    }
    fprintf (f, "\n");
  }
}

void clock_init_fonts()
{
    if (!time1_font_desc) {
        time1_font_desc = pango_font_description_from_string(get_default_font());
        pango_font_description_set_weight(time1_font_desc, PANGO_WEIGHT_BOLD);
        pango_font_description_set_size(time1_font_desc, pango_font_description_get_size(time1_font_desc));
    }
    if (!time2_font_desc) {
        time2_font_desc = pango_font_description_from_string(get_default_font());
        pango_font_description_set_size(time2_font_desc,
                                        pango_font_description_get_size(time2_font_desc) - PANGO_SCALE);
    }
}

static void
gimp_scale_combo_box_style_set (GtkWidget *widget,
                                GtkStyle  *prev_style)
{
  GtkWidget  *entry;
  GtkRcStyle *rc_style;
  gint        font_size;
  gdouble     scale;

  GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);

  gtk_widget_style_get (widget, "label-scale", &scale, NULL);

  entry = gtk_bin_get_child (GTK_BIN (widget));

  rc_style = gtk_widget_get_modifier_style (GTK_WIDGET (entry));

  if (! rc_style->font_desc)
    {
      PangoContext         *context;
      PangoFontDescription *font_desc;

      context = gtk_widget_get_pango_context (widget);
      font_desc = pango_context_get_font_description (context);

      rc_style->font_desc = pango_font_description_copy (font_desc);
    }

  font_size = pango_font_description_get_size (rc_style->font_desc);
  pango_font_description_set_size (rc_style->font_desc, scale * font_size);

  gtk_widget_modify_style (GTK_WIDGET (entry), rc_style);
}

/* {EV_FONT_IMP}.set_height_in_points */
void F1035_13194 (EIF_REFERENCE Current, EIF_INTEGER_32 arg1)
{
	GTCX
	EIF_POINTER tp1;
	EIF_REFERENCE tr1 = NULL;
	EIF_INTEGER_32 ti4_1;
	EIF_INTEGER_32 ti4_2;
	RTLD;
	
	RTLI(2);
	RTLR(0,Current);
	RTLR(1,tr1);
	
	RTGC;
	*(EIF_INTEGER_32 *)(Current+ _LNGOFF_3_2_0_2_) = (EIF_INTEGER_32) arg1;
	tr1 = RTOSCF(13229,F1035_13229,(Current));
	ti4_1 = F791_8091(RTCV(tr1), arg1);
	*(EIF_INTEGER_32 *)(Current+ _LNGOFF_3_2_0_3_) = (EIF_INTEGER_32) ti4_1;
	tp1 = *(EIF_POINTER *)(Current+ _PTROFF_3_2_0_8_0_0_);
	ti4_1 = *(EIF_INTEGER_32 *)(Current+ _LNGOFF_3_2_0_2_);
	ti4_2 = (EIF_INTEGER_32) PANGO_SCALE;
	pango_font_description_set_size((PangoFontDescription*) tp1, (gint) (EIF_INTEGER_32) (ti4_1 * ti4_2));
	F1035_13198(Current);
	RTLE;
}

void SetUpStatusBarStuff (GtkWidget* aWindow)
{
	_String			   fName = baseDirectory & "GTKResources/striped.xpm";
	statusBarLayout			 = pango_layout_new (screenPContext);
	statusBarFontDesc		 = pango_font_description_new ();
	stripedFill				 = gdk_pixmap_create_from_xpm (GDK_DRAWABLE(aWindow->window), NULL, NULL, fName.sData);
	stripedFillGC			 = gdk_gc_new (GDK_DRAWABLE(aWindow->window));
	if (stripedFill)
	{
		gdk_gc_set_fill (stripedFillGC,GDK_TILED);
		gdk_gc_set_tile	(stripedFillGC,stripedFill);
	}
	else
	{
		printf ("Failed to load a status bar .xpm from %s\n", fName.sData);
	}
	
	gdk_gc_set_line_attributes		  (stripedFillGC, 1, GDK_LINE_SOLID, GDK_CAP_NOT_LAST, GDK_JOIN_MITER);
	GdkColor saveFG = {0,0,0,0};
	gdk_gc_set_foreground			  (stripedFillGC, &saveFG);

	pango_font_description_set_family (statusBarFontDesc, statusBarFont.face.sData);
	pango_font_description_set_style  (statusBarFontDesc, (statusBarFont.style & HY_FONT_ITALIC) ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);
	pango_font_description_set_weight (statusBarFontDesc, (statusBarFont.style & HY_FONT_BOLD) ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
	pango_font_description_set_size   (statusBarFontDesc, statusBarFont.size*PANGO_SCALE);
	pango_layout_set_font_description (statusBarLayout, statusBarFontDesc ); // ref ?
	pango_layout_set_width			  (statusBarLayout, -1);
	
	redButtonIcon = (GdkPixbuf*)ProcureIconResource(4000);
	yellowButtonIcon = (GdkPixbuf*)ProcureIconResource(4001);
	greenButtonIcon = (GdkPixbuf*)ProcureIconResource(4002);
	orangeButtonIcon = (GdkPixbuf*)ProcureIconResource(4003);
	
}

static void
gst_time_overlay_class_init (GstTimeOverlayClass * klass)
{
  GstTextOverlayClass *gsttextoverlay_class;
  PangoContext *context;
  PangoFontDescription *font_description;

  gsttextoverlay_class = (GstTextOverlayClass *) klass;

  gsttextoverlay_class->get_text = gst_time_overlay_get_text;

  g_mutex_lock (GST_TEXT_OVERLAY_CLASS (klass)->pango_lock);
  context = GST_TEXT_OVERLAY_CLASS (klass)->pango_context;

  pango_context_set_language (context, pango_language_from_string ("en_US"));
  pango_context_set_base_dir (context, PANGO_DIRECTION_LTR);

  font_description = pango_font_description_new ();
  pango_font_description_set_family_static (font_description, "Monospace");
  pango_font_description_set_style (font_description, PANGO_STYLE_NORMAL);
  pango_font_description_set_variant (font_description, PANGO_VARIANT_NORMAL);
  pango_font_description_set_weight (font_description, PANGO_WEIGHT_NORMAL);
  pango_font_description_set_stretch (font_description, PANGO_STRETCH_NORMAL);
  pango_font_description_set_size (font_description, 18 * PANGO_SCALE);
  pango_context_set_font_description (context, font_description);
  pango_font_description_free (font_description);
  g_mutex_unlock (GST_TEXT_OVERLAY_CLASS (klass)->pango_lock);
}

/* Get the current font as a PangoFontDescription.
Must be freed with pango_font_description_free. */
PangoFontDescription *
get_font_description(void)
{
	PangoFontDescription *font = get_font_family();
	pango_font_description_set_size(font, get_font_size(font));
	return font;
}

static void
adjust_font_size(GtkWidget *widget, gpointer data, gint howmuch)
{
	VteTerminal *terminal;
	PangoFontDescription *desired;
	gint newsize;
	gint columns, rows, owidth, oheight;

	/* Read the screen dimensions in cells. */
	terminal = VTE_TERMINAL(widget);
	columns = terminal->column_count;
	rows = terminal->row_count;

	/* Take into account padding and border overhead. */
	gtk_window_get_size(GTK_WINDOW(data), &owidth, &oheight);
	owidth -= terminal->char_width * terminal->column_count;
	oheight -= terminal->char_height * terminal->row_count;

	/* Calculate the new font size. */
	desired = pango_font_description_copy(vte_terminal_get_font(terminal));
	newsize = pango_font_description_get_size(desired) / PANGO_SCALE;
	newsize += howmuch;
	pango_font_description_set_size(desired,
					CLAMP(newsize, 4, 144) * PANGO_SCALE);

	/* Change the font, then resize the window so that we have the same
	 * number of rows and columns. */
	vte_terminal_set_font(terminal, desired);
	gtk_window_resize(GTK_WINDOW(data),
			  columns * terminal->char_width + owidth,
			  rows * terminal->char_height + oheight);

	pango_font_description_free(desired);
}

static void
apply_subtitle_style_to_layout (GtkStyleContext *context,
                                PangoLayout     *layout,
                                GtkStateFlags    flags)
{
  PangoFontDescription *desc;
  PangoAttrList *layout_attr;
  PangoAttribute *attr_alpha;

  gtk_style_context_save (context);
  gtk_style_context_set_state (context, flags);
  gtk_style_context_get (context, gtk_style_context_get_state (context),
                         "font", &desc,
                         NULL);
  gtk_style_context_restore (context);

  /* Set the font size */
  pango_font_description_set_size (desc, pango_font_description_get_size (desc) * SUBTITLE_SIZE_PERCENTAGE);
  pango_layout_set_font_description (layout, desc);
  pango_font_description_free (desc);

  /* Set the font alpha */
  layout_attr = pango_attr_list_new ();
  attr_alpha = pango_attr_foreground_alpha_new (SUBTITLE_DIM_PERCENTAGE * 65535);
  pango_attr_list_insert (layout_attr, attr_alpha);

  pango_layout_set_attributes (layout, layout_attr);
  pango_attr_list_unref (layout_attr);
}

static int
_pango_xft_Load(TextState * ts, const char *name)
{
   FontCtxPangoXft    *fdc;
   PangoFontDescription *font;
   PangoFontMask       flags;

   if (!_pango_ctx)
      _pango_ctx = pango_xft_get_context(disp, Dpy.screen);
   if (!_pango_ctx)
      return -1;

   font = pango_font_description_from_string(name);
   if (!font)
      return -1;

   flags = pango_font_description_get_set_fields(font);
   if ((flags & PANGO_FONT_MASK_FAMILY) == 0)
      pango_font_description_set_family(font, "sans");
   if ((flags & PANGO_FONT_MASK_SIZE) == 0)
      pango_font_description_set_size(font, 10 * PANGO_SCALE);

   fdc = EMALLOC(FontCtxPangoXft, 1);
   if (!fdc)
      return -1;
   fdc->font = font;
   ts->fdc = fdc;
   ts->need_utf8 = 1;
   ts->type = FONT_TYPE_PANGO_XFT;
   ts->ops = &FontOps_pango;
   return 0;
}

/*!
  \brief draw_valtext() draws the dynamic values for the traces on 
  the left hand side of the logviewer. This is optimized so that if the value
  becomes temporarily static, it won't keep blindly updating the screen and
  wasting CPU time.
  \param force_draw when true to write the values to screen for
  all controls no matter if hte previous value is the same or not.
  */
G_MODULE_EXPORT void draw_valtext(gboolean force_draw)
{
	gint last_index = 0;
	gfloat val = 0.0;
	gfloat last_val = 0.0;
	gint val_x = 0;
	gint val_y = 0;
	gint info_ctr = 0;
	gint h = 0;
	gint i = 0;
	GArray *array = NULL;
	Viewable_Value *v_value = NULL;
	PangoLayout *layout;
	GdkPixmap *pixmap = lv_data->pixmap;
	GtkAllocation allocation;

	gtk_widget_get_allocation(lv_data->darea,&allocation);

	h = allocation.height;

	if (!lv_data->font_desc)
	{
		lv_data->font_desc = pango_font_description_from_string("courier");
		pango_font_description_set_size(lv_data->font_desc,(10)*PANGO_SCALE);
	}
	
	val_x = 7;
	for (i=0;i<lv_data->active_traces;i++)
	{
		v_value = (Viewable_Value *)g_list_nth_data(lv_data->tlist,i);
		info_ctr = (lv_data->spread * (i+1))- (lv_data->spread/2);
		val_y = info_ctr + 1;

		last_index = v_value->last_index;
		array = DATA_GET(v_value->object,v_value->data_source);
		val = g_array_index(array,gfloat,last_index);
		if (array->len > 1)
			last_val = g_array_index(array,gfloat,last_index-1);
		/* IF this value matches the last one,  don't bother
		 * updating the text as there's no point... */
		if ((val == last_val) && (!force_draw) && (!v_value->force_update))
			continue;
		
		v_value->force_update = FALSE;
		gdk_draw_rectangle(pixmap,
				gtk_widget_get_style(lv_data->darea)->black_gc,
				TRUE,
				v_value->ink_rect->x+val_x,
				v_value->ink_rect->y+val_y,
				lv_data->info_width-1-v_value->ink_rect->x-val_x,
				v_value->ink_rect->height);

		layout = gtk_widget_create_pango_layout(lv_data->darea,g_strdup_printf("%1$.*2$f",val,v_value->precision));

		pango_layout_set_font_description(layout,lv_data->font_desc);
		pango_layout_get_pixel_extents(layout,v_value->ink_rect,v_value->log_rect);
		gdk_draw_layout(pixmap,v_value->font_gc,val_x,val_y,layout);
	}

}

/*!
* \todo ROB parse more attributes like font-color, background-color
*/
void 		 
AP_UnixToolbar_StyleCombo::getPangoAttrs (PD_Style *pStyle, 
										  PangoFontDescription *desc) {

	UT_return_if_fail (pStyle);
	UT_LocaleTransactor t (LC_NUMERIC, "C");

	const gchar *value = NULL;

	if (pStyle->getPropertyExpand ("font-family", value)) {
		pango_font_description_set_family (desc, value);
	}

	if (pStyle->getPropertyExpand ("font-size", value)) {
		pango_font_description_set_size (desc, (gint)(UT_convertToDimension (value, DIM_PT) * PANGO_SCALE));
	}

	if (pStyle->getPropertyExpand ("font-style", value)) {
		PangoStyle style = PANGO_STYLE_NORMAL;
		if (!strcmp (value, "italic"))
			style = PANGO_STYLE_ITALIC;
		pango_font_description_set_style (desc, style);
	}

	if (pStyle->getPropertyExpand ("font-weight", value)) {
		PangoWeight weight = PANGO_WEIGHT_NORMAL;
		if (!strcmp (value, "bold"))
			weight = PANGO_WEIGHT_BOLD;
		pango_font_description_set_weight (desc, weight);
	}
}

static bool
pango_load (Lisp_Font *f)
{
    PangoLanguage *language;
    PangoFontDescription *fontdesc;
    PangoFont *font;
    PangoFontMetrics *metrics;

    if (pango_context)
    {
	language = pango_context_get_language (pango_context);
    }
    else
    {
	char *langname, *p;

#ifdef HAVE_PANGO_XFT
	pango_context = pango_xft_get_context (dpy, screen_num);
#endif

	langname = g_strdup (setlocale (LC_CTYPE, NULL));
	p = strchr (langname, '.');
	if (p)
	    *p = 0;
	p = strchr (langname, '@');
	if (p)
	    *p = 0;
	language = pango_language_from_string (langname);
	pango_context_set_language (pango_context, language);
	g_free (langname);
    }

    fontdesc = pango_font_description_from_string (rep_STR (f->name));

    if (!pango_font_description_get_family (fontdesc))
	pango_font_description_set_family (fontdesc, "Sans");
    if (pango_font_description_get_size (fontdesc) <= 0)
	pango_font_description_set_size (fontdesc, 12 * PANGO_SCALE);

    pango_context_set_font_description (pango_context, fontdesc);
    font = pango_context_load_font (pango_context, fontdesc);

    if (!font) {
        pango_font_description_free(fontdesc);
	return FALSE;
    }

    metrics = pango_font_get_metrics (font, language);

    f->ascent = metrics->ascent / PANGO_SCALE;
    f->descent = metrics->descent / PANGO_SCALE;

    pango_font_metrics_unref (metrics);

    f->font = fontdesc; /* We save the font description, not the font itself!
                        That's because it seems we can't recover it perfectly
                        later, and the layout routines want a description */

    return TRUE;
}

//		Narysowanie zawartosci calego okna (z legenda, opisami osi i charakterystykami)
void t_display_przerysuj(T_Display *w)
{
		int szer, wys ;
		double units_per_pixel_x ;
		//double units_per_pixel_y ;
		
		szer = w->canvas->allocation.width ;
		wys = w->canvas->allocation.height ;
		
		units_per_pixel_x = (double)w->time_range / ((double)szer) ;
		
		//PangoLayout *etykieta = gtk_widget_create_pango_layout (w->canvas, "");									
		PangoContext *pc = gtk_widget_get_pango_context (w->canvas) ;
		PangoFontDescription* pfd = pango_context_get_font_description (pc) ;
		//printf ("czcionka %d\n", pango_font_description_get_size(pfd)) ;
		pango_font_description_set_size (pfd, w->font_size * PANGO_SCALE) ;
		//pango_layout_context_changed(etykieta) ;
		
		
		t_display_draw_legend(w) ;
		t_display_calculate_borders(w) ;
		t_display_rysuj_siatke_czas(w) ;
		t_display_rysuj_siatke_temp(w) ;
		t_display_draw_plots(w) ;
		
} ;